n. 绒毛膜, 浆膜, 卵壳

[医] 绒[毛]膜

[ noun ]
the outermost membranous sac enclosing the embryo in higher vertebrates (reptiles, birds and mammals)
<noun.animal>

Chorion \Cho"ri*on\, n. [NL., fr. Gr. ?.]
1. (Anat.)
(a) The outer membrane which invests the fetus in the
womb; also, the similar membrane investing many ova at
certain stages of development.
(b) The true skin, or cutis.

2. (Bot.) The outer membrane of seeds of plants.
※ ||